Hello guys and thank you for your time. I am trying to create a validation middleware. I am using Joi to validate the information i receive from the request body.

i would like to allow only the following strings for example: ['a','b','c'] but also allow both upper case and lowercase instances. (for example 'A' is also valid);

what i tried to do:

const schema = Joi.object().keys({
   letter: Joi.string().valid('a','b','c').insensitive()
})

schema.validate({letter: 'B'}) //return error but i want it to return 'B'

I have also tried every bination of lowercase and uppercase functions with convert but i could not make it work. i would like that for example {letter: 'A'} would turn out valid.

is there a way to bine valid function with insensitive so that uppercase and lowercase will all get accepted?

Thank you for your time.

Hello guys and thank you for your time. I am trying to create a validation middleware. I am using Joi to validate the information i receive from the request body.

i would like to allow only the following strings for example: ['a','b','c'] but also allow both upper case and lowercase instances. (for example 'A' is also valid);

what i tried to do:

const schema = Joi.object().keys({
   letter: Joi.string().valid('a','b','c').insensitive()
})

schema.validate({letter: 'B'}) //return error but i want it to return 'B'

I have also tried every bination of lowercase and uppercase functions with convert but i could not make it work. i would like that for example {letter: 'A'} would turn out valid.

is there a way to bine valid function with insensitive so that uppercase and lowercase will all get accepted?

Thank you for your time.

• javascript
• node.js
• validation
• hapi.js
• joi

Share Improve this question Follow asked Mar 5, 2020 at 15:18 Reuven Regev FaragReuven Regev Farag 5111 gold badge11 silver badge22 bronze badges

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1 Answer 1

Sorted by: Reset to default 5

I guess it is working fine. If you run the following code you will get {"letter": "b"}

const Joi = require("@hapi/joi");
const schema = Joi.object().keys({
  "letter": Joi.string().valid("a", "b", "c").insensitive()
});

console.log(schema.validate({"letter": "B"}, {"convert": true}));

With convert false, you will get B in caps.

You could see running code here - https://repl.it/repls/HarmfulEvenPhases